Collar can and method of making same



c. J. AULBACH COLLAR CAN AND METHOD OF MAKING SAME Filed Dec. 8, 1932 patenteci Dec. 26,

COLLAR can AND METHOD OF MAKING SAM Charles J. Aulbach, Syracuse, N. Y.,assignor to Continental Can Company, Inc.,. New N. Y., a corporation ofNew York York,

Application December a, 1932. Serial No. 646,325

3 Claims.

The invention relates to new and useful improvenien'ts in a collar can,and the method of making the same;

An object of the invention is to provide a collar can wherein theinserted collar is held in the can through the gripping action of anoutwardly rolled bead at the lower end of the collar having the raw edgethereof contacting with and biting into the wall of the can.

A further object of the invention is to provide a method of producing acollar can of the above type wherein the collar may be freely insertedin the can without unduly straining the same, and wherein the lower edgeportion is brought into gripping contact with the can body 'wall by aforming die after the collar is placed.

In the drawing which shows by way of illustration one form of collar canand the method of making the samev Figure '1 is a sectional view showingthe formed collar partly placed inthe container preparatoryto theseating and fixing of the collar in the can; g

Fig. 2 is a sectional view through the collar and can body and the diesused for seating the collar and shaping the lower end portionof thecollar for contact with the walls of the'can, and

Fig. 3 is a sectional view through the finished can with the collarinserted and with an end secured thereto. p

The improvement in the collar'can will be first described, and then themethod of forming the same. The collar can consists of a body portion 1preferably of cylindrical form, to which a can end 2 is secured by adouble seam 3. The wall of the can body is provided with a score line 4and also a score line 5 setting off a tearing strip with the usualprojecting tongue on which a key may be placed for rupturing the metalalong the score lines, and thus disconnecting the end from the bodyportion.

Disposed within the can body is a collar 6 having a portion 7intermediate the upper and lower edges thereof which contacts with thebody wall below the lower score line 5. The collar is so dimensioned asto have a frictional grip on the body wall in this region. The collarabove the portion '7 is inset, and at the upper edge portion is rolledinwardly as indicated at 8 so as to strengthen the upper edge of thecollar and form a smooth edge. The can end 2 in the present embodimentof the invention has a depressed portion 9 forming a depending collarwhich lies between the inserted collar 6 in the body wall and servesas areclosing means after the rip strip has been torn away. v

The new feature of the collar can resides in the means for holding thecollar in place in the can. body. The can body wall is preferably formedwithout a bead therein. lhe lower portion of the collar is bent inwardlyat 10 and thence outwardly at 11 with the upwardly extending portion soarranged that the raw edge of the metal.

will contact with the inner surface of the Wall of the can body. Theou'twardly bent portion is preferably die-formed after the collar isinserted in the can body, and the raw edge of the metal is forced intofirm gripping contact with thewall of the can body. The edge is sodisposed that it will hold the collar from either an inward or outwardmovement. in the can body. When.

formed after the collar has been initially placed in the can body. Thelower edge portion 6 of the collar is initially formed so that it issubstantially in line with the upper inset portion 6 of the collar.Iniact, the collar is initially formed of a diameter approximately thatindicated at 6? and 6 and the portion therebetween is offset outwardlyfor contact with the wall of the can. By shaping thecollar thisway, the

oiiset portion contacting with the can may be dimensioned so as to makejust the desired frictional contact with the can. a

There are advantages in the fianging of the can body at the same timewhen the collar is seated therein. By shaping the collar as describedabove, it may be readily inserted in the can body before said can bodyis fianged as shown in Fig. 1 of the drawing. The inset portion 6 willslip into the can body, and the inclined wall leading to the offsetportion which contacts with the can body wall will direct the collarinto the can body. The collar may be very easily pressed into the canbody to the extent shown in Fig. 1. It is then submitted to formingdies, as shown in Fig. 2 of the drawing. The upper die member 12 isprovided with a depending portion 13 inset from the outer edgepredetermined distance from the top edge of the.

flange so that when the end 2 is placed on the can, said end willcontact with the top edge of the collar. This gives a maximum capacityfor the can. The can may be filled practically 'tothe top edge of thecollar, and this is to a very slight distance below the inner face ofthecan end 2. When the tearing strip'is removed, there will be nospilling of the contents, as the can has'capacity when the tearing stripis removed for the entire content sealed in the can.

beused for flanging the lower edgeof the can body. 'Said die member 17has an extending portion18 which is curved at '19 for die shaping thelower edge portion of the can body wall. The fiangefformed isindicatedat 26. There is a limiting wall '21"which" determines the length of theflange" formed at the bottom of the can. This serves also as anjabutment to prevent endwise movementjof' the can body when the collaris being forced intoithe can body by the upper die member; If it werenot for this limiting wall, the ,fl anges mightlack uniformity, due tothe fact that at the same time the upper flange is formed, the" collaris forced into frictional engagement with the can wall by the downwardpressureof theupperdie member. The lower die memberl'lis providedwith acurling surface 22.1 The portion 6 of the collar passes along thevertical"wallj23fof the die member 17 and is'brought" into engagementwith this, curling 'surface 22', which rolls the lower edge portion ofthe'collar'outwardly and forces the raw edge of themetal into bitingcontact with the inner walrof fthe' can body. This edge maybeembedded'inthewall "of the can body to a slight 'extentysoasto make avery tight joint between the collar and the can body, preventing leakagejof thecontents of the canpast said gripe ping line. Furthermorathisgripping contact pe'tween the'lower edgejof the collar and the"canjwallwill firmly hold thecollarfrom any end- "'I have also provideda very simple method of can-body.

There is also a lower diemember 17 which may" 'serting a formed collarintoisaid can bodylover producing this collar can, wherein the collar isforced into the can without undue frictional contact between the two,and is finally seated by dieshaping the lower edge portion to bring itinto contact with the wall of the can. Furthermore, by my improvedmethod, the flanges may be formed on the can body at the sametime thatthe collar is seated and attached thereto, and this will lock the collara predetermined distance from the formed flange at the upper end of theWhile it is preferred to form the flanges when the collar is seated, itwill be understood that the invention may be applied to the placing andseating of a collar by a forming die in the can body on which theflanges have already been formed;

l-laving'thus described the invention, what I claim-as new and desire tosecure by Letters Patent, is-

1. A can comprising a cylindrical body having score lines forming atearing strip, a collar: within said'body overlying the region of thetearing, strip, said collar having the central portion thereof infrictional engagement withfthecan body, and the lower portion thereofspaced inwardly. 1m) away from the can body and bent outwardlyiand-i.upwardly into said space so as to causeth'e'..-raw edge of the metalforming thewcollaritocontactgwith and grip the wall of the canbody,.saidic'an body aboveiand below the collar and inlthe; region thereofbeing of uniform diameterandfreefrom i inwardly and outwardly projectingportions.

2. The method of making a rip strip collar can... consisting in forminga cylindricalican body,1in-.

lying the rip stripwhich collar is dimensioned so as to have frictionalgripping,contact.with..the

body wall intermediate the 'upper andlower edge portions of the collar,die-curlingthei loweriedgew portion of the collar outwardly andupwardly'l so as to cause'the extreme loweredge portion oithe. collar togrip the wall of the can. body-T hileW maintaining saidcan body belowthe collar and, in the region of the collar of uniformdiameter 3. Themethod of vmaking a ripstrip collar. can

as to havefrictional gripping ,contactswithiltheo, body wallintermediate the upper andlower-iedge,

portions of the collar, die,-curling the lower edge portion of thecollanoutwardly and upwardlyifso. as to cause .the extreme lower edgeportion'of the. collar to grip thejwall of the can body'whilejmainetaining said can body'below the "collarand'inthe region ofthe collar ofuniform diameter; and die-i flangingthe upper edge "of thecanbody after"said collar has been inserted and simultaneously" with the curling oftheloweredge of the collar.

M CHARLES J. AULBACH.

